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Marathoners of the Sky Hormones speed pigeons. Today, Hamilton and his “grandson,” John Timmerman, have about 750 pigeons in Jamul, the largest collection in San Diego County. As we sat on the deck of their ...

Rocks are for climbing, collecting, throwing, building. They're also full of information, if you can read a rock. Scientists who become fluent in rock — geologists — peruse these old, hard texts and interpret them. ...